-1.51% is the change from 863 to 850
Calculation steps:
[( 850 - 863 ) ÷ 863] x 100 = -1.51%
Formula
Percentage change = [(850 - 863) / 863] x 100
Subtract the new number by the original number
850 - 863 = -13
-13 ÷ 863 = -0.015063731170336037
-0.015063731170336037 x 100 = -1.51%